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bq78PL116

www.ti.com

SLUSAB8B –OCTOBER 2010– REVISED FEBRUARY 2011

PowerLAN™ Master Gateway Battery Management Controller

With PowerPump™ Cell Balancing Technology

Check for Samples: bq78PL116

FEATURES

of Cells and MOSFETs With up to 4 Sensors

• bq78PL116 Designed for Managing 3- to

• Fail-Safe Operation of Pack Protection

16-Series-Cell Battery Systems Circuits: Up to Three Power MOSFETs and

One Secondary Safety Output (Fuse)

– Support for LCD and Electronic Paper

Displays or EPDs • Fully Programmable Voltage, Current, Balance,

and Temperature-Protection Features

– Configurable for 11-A, 26-A, or 110-A

Operating Currents • External Inputs for Auxiliary MOSFET Control

• Systems With More Than Four Series Cells • Smart Battery System 1.1 Compliant via

Require External bq76PL102 Dual-Cell SMBus

Monitors

APPLICATIONS

• SmartSafety Features:

• Portable Medical Instruments and Test

– Prevention: Optimal Cell Management

Equipment

– Diagnosis: Improved Sensing of Cell

• Mobility Devices (E-Bike)

Problems

• Uninterruptible Power Supplies and Hand-Held

– Fail Safe: Detection of Event Precursors

Tools

• Rate-of-Change Detection of All Important Cell

Characteristics:

DESCRIPTION

– Impedance

The bq78PL116 master gateway battery controller is

– Cell Temperature

part of a complete Li-Ion control, monitoring, and

safety solution designed for large series cell strings.

• PowerPump Technology Transfers Charge

Efficiently From Cell to Cell During All

The bq78PL116 along with bq76PL102 PowerLAN™

Operating Conditions, Resulting in Longer

dual-cell monitors provide complete battery-system

Run Time and Cell Life

control, communications, and safety functions for a

structure of three up to 16 series cells. This

– Includes User-Configurable PowerPump

PowerLAN system provides simultaneous,

Cell-Balancing Modes

synchronized voltage and current measurements

• High-Resolution 18-Bit Integrating Delta-Sigma

using one A/D per-cell technology. This eliminates

Coulomb Counter for Precise Charge-Flow

system-induced noise from measurements and allows

Measurements and Gas Gauging

the precise, continuous, real-time calculation of cell

impedance under all operating conditions, even

• Multiple Independent Δ-Σ ADCs: One-per-Cell

during widely fluctuating load conditions.

Voltage, Plus Separate Temperature, Current,

and Safety

PowerPump technology transfers charge between

cells to balance their voltage and capacity. Balancing

• Simultaneous, Synchronous Measurement of

is possible during all battery modes: charge,

Pack Current and Individual Cell Voltages

discharge, and rest. Highly efficient charge-transfer

• Very Low Power Consumption

circuitry nearly eliminates energy loss while providing

– < 400 μA Active, < 185 μA Standby, < 85 μA

true real-time balance between cells, resulting in

Ship, and < 1 μA Undervoltage Shutdown

longer run-time and improved cycle life.

• Accurate, Advanced Temperature Monitoring

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas

Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

2PowerLAN, PowerPump, bqWizard are trademarks of Texas Instruments.

3All other trademarks are the property of their respective owners.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

Summary of content (35 pages)

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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. DESCRIPTION (CONTINUED) Temperature is sensed by up to 4 external sensors and one on-chip sensor. This permits accurate temperature monitoring of each cell individually.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 B0332-03 Pack Positive www.ti.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 1. ORDERING INFORMATION Product bq78PL116 (1) Cell Configuration (1) Package Package Designator 3 to 16 series cells QFN-48, 7-mm × 7-mm Temperature Range –40°C to 85°C RGZ Ordering Number Quantity, Transport Media bq78PL116RGZ T 250, tape and reel bq78PL116RGZ R 2500, tape and reel For configurations consisting of more than four series cells, additional bq76PL102 parts must be used.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com bq78PL116 TERMINAL FUNCTIONS (continued) NAME NO.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com ABSOLUTE MAXIMUM RATINGS (1) over operating free-air temperature range (unless otherwise noted) RANGE UNITS TA Operating free-air temperature (ambient) –40 to 85 °C Tstg Storage temperature –65 to 150 °C V4 Voltage range with respect to V3 –0.5 to 5.0 V V3 Voltage range with respect to V2 –0.5 to 5.0 V V2 Voltage range with respect to V1 –0.5 to 5.0 V V1 Voltage range with respect to VSS –0.5 to 5.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com ELECTRICAL CHARACTERISTICS TA = –40°C to 85°C (unless otherwise noted) DC Characteristics PARAMETER TEST CONDITIONS IDD Operating-mode current (at V2) ISTBY Standby-mode current (at V2) SMBCLK = SMBDAT = VSS, IBAT = 0, cells = 3.6 V ISHIP Ship-mode current (at V2) SMBCLK = SMBDAT = VSS, IBAT = 0, cells = 3.6 V IECUV Extreme cell undervoltage shutdown current All cells < 2.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 Coulomb-Count Characteristics (1) www.ti.com (2) PARAMETER TEST CONDITIONS MIN Resolution TYP Intergral nonlinearity 0.008% Snap-to-zero (deadband) ±100 (3) (1) (2) (3) MAX 5 UNIT nVh μV Shares common input with current-sense section (CCBAT, CCPACK) After calibration. Accuracy is dependent on system calibration and temperature.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com SMBus Characteristics (1) over free-air temperature range (unless otherwise noted) PARAMETER TEST CONDITIONS VIL Input low voltage VIH Input high voltage VOL Output low voltage CL Capacitance, each I/O pin fSCL SCLK nominal clock frequency RPU (2) Pullup resistors for SCLK, SDATA (1) (2) MIN 350-µA sink current TA = 25°C TYP MAX UNIT 0 0.8 V 2.1 5.5 V 0 0.4 V 10 pF 100 kHz 10 100 VBUS 5 V nominal 13.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com FEATURE SET Primary (First-Level) Safety Features The bq78PL116 implements a breadth of system protection features which are easily configured by the customer. First-level protections work by controlling the MOSFET switches.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Display Types • The bq78PL116 drives a three- to five-segment LED display in response to a pushbutton (LEDEN) input signal. Each LED pin can sink up to 10 mA. • The bq78PL116 drives a three- to five-segment static liquid-crystal display. • The bq78PL116 drives a three- to five-segment electronic paper display. An external 15-V voltage source is required. E Ink Corporation supplies this type of display.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com OPERATION The bq78PL116 battery-management controller serves as a master controller for a Li-Ion battery system consisting of up to 16 cells in series. Any number of cells may be connected in parallel; other system or safety issues limit the number of parallel cells. The bq78PL116 provides extraordinarily precise state-of-charge gas gauging along with first- and second-level pack safety functions.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com A variety of techniques, such as simple terminal voltage, terminal voltage corrected for impedance and temperature effects, or state-of-charge balancing, is easily implemented by the bq78PL116. By tracking the balancing required by individual cells, overall battery safety is enhanced, often allowing early detection of soft shorts or other cell failures.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Electronic paper displays require an external power supply, typically 15 V, to power the display. In EPD, mode the bq78PL116 strobes the display outputs for a user- programmable period of milliseconds to drive an external voltage multiplier or charge pump to the required display supply voltage.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com COMMUNICATIONS SMBus The bq78PL116 uses the industry-standard Smart Battery System’s two-wire System Management Bus (SMBus) communications protocol for all external communication. SMBus version 1.1 is supported by the bq78PL116, and includes clock stretching, bus fault time-out detection, and optional packet error checking (PEC). For additional information, see the www.smbus.org and www.sbs-forum.org Web sites.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.
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V3 D3 Q10-A Q10-B R5 R10 R21 C7 C21 C19 C17 R36 Q3 R18 R16 C24 C18 C11 C23 Q4 C20 1 48 12 11 47 8 15 16 17 20 21 22 23 44 43 42 39 VSS OSCO OSCI V1 VLDO1 P1N P2S P2N P3S P3N P4S P4N V2 VLDO2 V3 V4 U1 Z4 BATTERY- VSS R37 Q6 POWERPUMP CIRCUIT COMPONENT VALUES/TYPE WILL VARY BY APPLICATION. TYPICAL SHOWN. C1 D4 Q9-A R24 R17 R2 R7 3 L1 D1 C2 Q9-B R8 PRE-CHARGE RESISTOR (R9) VALUE WILL VARY BY APPLICATION.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 2. Bill of Materials for 3S Application Qty Reference Value Description Size Manufacturer Mfg Part No. 5 C10 C12-13 C16 C22 0.1uF Capacitor SMT Ceramic X7R +/-10% 50V 5 C11 C18 C20 C23-24 10uF Capacitor SMT Ceramic X5R +/-10% 6.3V 603 Standard Standard 3 C1-3 0.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 2. Bill of Materials for 3S Application (continued) Qty 22 Reference Value Description Size Manufacturer Mfg Part No. 2 Q11-12 MOSFET P-Channel SMT -30VDS 1 U1 PowerLAN Master Gateway Battery Management Controller QFN48 Texas Instruments bq78PL116RGZR 3 Z1-2 Z5 5.
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V0 V1 V2 V3 V4 J1 V4 V5 C4 C5 C6 C33 R6 R12 L2 R39 L3 R42 L4 L1 C1 D1 C2 D3 D4 D2 D5 C30 D6 D7 C32 D8 Z3 Q10-A Q10-B Q9-A Q9-B Q8-A Q8-B Q13-A Q13-B R5 R10 R21 R24 R40 R41 R43 R44 R8 Q5 C7 C21 C19 C17 C28 C27 C31 C29 R17 R2 Q12 P5S VSS R36 Q3 R18 R16 C24 C18 C11 C26 R7 Submit Documentation Feedback C20 48 12 11 47 8 15 16 17 20 21 22 23 44 43 42 39 VSS OSCO OSCI V1 VLDO1 P1N P2S P2N P3S P3N P4S P4N V2 VLD
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Product Folder Link(s): bq78PL116 V5 V6 V7 V8 J2 Cells 5 to 8 V4 V5 V8 C37 C45 C66 C38 R72 L5 R65 L6 R61 L7 R53 L8 C35 C39 C64 C63 D17 D18 D19 D20 D9 D10 D11 D12 R73 Q14-A Q14-B R66 Q16-A Q16-B R62 Q18-A Q18-B R54 Q19-A Q19-B R71 R63 R55 R52 C36 C34 C44 C43 C65 C52 C71 C70 P9S P5S C49 C50 C75 C76 U3 V2 V1 V2 15 V1 8 PUMP2N 7 PUMP2S 6 PUMP1N 5 PUMP1S 12 BQ76PL102 U2 15 8 PUMP2N 7 PUMP2S 6 PUMP1N 5 PUMP1S 12 BQ76PL102 14 XT1 13 XT2 VL
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© 2010–2011, Texas Instruments Incorporated Product Folder Link(s): bq78PL116 V9 V10 V11 V12 J3 Cells 9 to 12 V8 V9 V12 C42 C54 C61 C47 R45 L9 R48 L10 R51 L11 R58 L12 C78 C79 C80 C81 D13 D14 D15 D16 D21 D22 D23 R46 Q15-A Q15-B R49 Q17-A Q17-B R56 Q20-A Q20-B R59 Q21-A Q21-B R47 R50 R57 R60 C41 C40 C53 C51 C60 C59 C67 C62 P13S P9S C57 C58 C72 C77 U5 V2 V1 V2 15 V1 8 PUMP2N 7 PUMP2S 6 PUMP1N 5 PUMP1S 12 BQ76PL102 U4 15 8 PUMP2N 7 PUMP2S
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 C90 2 16 VPP VLDO 9 SDO 4 SDI 14 XT1 13 XT2 V1 C91 15 V2 8 PUMP2N 7 PUMP2S 6 PUMP1N 5 PUMP1S U6 12 C83 C82 R67 D25 C102 V13 V15 V14 V16 J4 Cells 13 to 16 V13 V12 C84 C88 C95 C85 R64 L13 R69 L14 Q22-A D26 D27 Q22-B R70 Q23-A C103 D28 Q23-B R76 D29 L15 R75 C104 D30 Q24-A Q24-B R74 R68 C87 C86 C94 R77 C93 P13S C92 C101 C100 BQ76PL102 2 16 VPP 9 SDO 4 SDI VLDO V1 15 V2 VSS TAB N/C N/C N/C
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 3. Bill of Materials for 16S Application (continued) Qty Reference Value Description Size Manufacturer Mfg Part No.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com Table 3. Bill of Materials for 16S Application (continued) Qty 28 Reference Value Description SOT-23 Standard Standard SOD-123 Standard Standard Standard Standard 2 Z1 Z2 5.6VDC Common Anode Zener Diode Pair 300mW 3 Z3-5 500mW Zener Diode 500mW 12V 1 SOCI 50mA Tactile Momentary Pushbutton Thru-Hole 1 HOST 1 J1 3 J2-4 4 BATTERY+ BATTERY- PACK+ PACK- Size Manufacturer Mfg Part No.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com 100Ω 1µF 25V 1µF 25V 1 1µF 25V 1 2 3 3 BAT54STA 1 2 3 BAT54STA 1µF 25V 2 BAT54STA 1µF 25V 4.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com 1MΩ 1MΩ 1MΩ 1MΩ 1MΩ 1MΩ 44 V2 PSH/BP/TP LED1/SEG1 LED2/SEG2 31 1MΩ NTS4001NT1G 1MΩ NTS4001NT1G VLDO1 TAB Vss 49 48 BP S1 S2 S3 S4 S5 S8 NTS4001NT1G 34 NTS4001NT1G 35 1MΩ LED5/SEG5 S7 33 1MΩ LED4/SEG5 S6 9 32 1MΩ LED3/SEG3 8 EXCEL 8-Segment Display 0408 To +ve of Cell 2 1 2 3 4 5 6 NTS4001NT1G bq78PL116 7 NTS4001NT1G 36 8 S004 NOTE: For reference only.
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bq78PL116 SLUSAB8B – OCTOBER 2010 – REVISED FEBRUARY 2011 www.ti.com REVISION HISTORY Changes from Revision A (October 2010) to Revision B Page • Revised PowerLAN Characteristics table ............................................................................................................................. 9 • Changed Ah values in Current Measurement paragraph ...................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, enhancements, improvements and other changes to its semiconductor products and services per JESD46, latest issue, and to discontinue any product or service per JESD48, latest issue. Buyers should obtain the latest relevant information before placing orders and should verify that such information is current and complete.